F102.4 Windows and Other Openings

Windows and other openings shall comply with Sections F102.4.1 and F102.4.2.

Operable windows and other openings providing required or voluntary natural ventilation located with any portion within 2 feet (610 mm) above outside ground level immediately below such opening shall be covered for their entire height and width of the operable portion with hardware cloth of at least 0.035 inch (0.89 mm) wire or heavier. The openings in the hardware cloth shall not exceed ¹/₄ inch (6.4 mm).

Operable windows and other openings providing required or voluntary natural ventilation in the exterior located within 2 feet (610 mm) of exposed pipes, wires, conduits and other appurtenances, shall be covered with wire cloth of at least 0.035 inch (0.89 mm) wire. The openings in the hardware cloth shall not exceed ¹/₄ inch (6.4 mm).

Exception: In lieu of wire cloth covering, said pipes, wires, conduits and other appurtenances shall be blocked from rodent usage in accordance with one of the following:

1. Installation of solid sheet metal collars 0.024 inch (0.61 mm) thick or heavier. Such collars shall be fastened around the pipes, wires, conduits or other appurtenances, projecting a minimum distance of 12 inches (305 mm) beyond and on either side of the pipes, wires, conduits or appurtenances.
2. Installation of solid sheet metal guards fastened securely to the exterior wall, projecting 12 inches (305 mm) perpendicularly from the exterior wall for the length of the opening plus 2 feet (610 mm) beyond each end of the opening.